Combined bevel and square.



0. A. OSMONSON. GMBINED BEVEL AND SQUARE. APPLIOATIoN FILED APB. 14, 190s.

912,605. Patented Feb. 16, 1909.

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Specicaticn of Letters Patent.

To all whom it may concer/1t.'

Be it lmown that l, @scan A.. OsnoNsoN, a citizen of the United States, residing at Crookston, in the countgr ci `Folli and State ot Minnesota, have invented a new and useful Combined Bevel and Square, oi' which the following is a specification.

This invention relates to measuring tools and more especially to that class of measuring instruments designed to lav ont leatl.c in squares.

This invention consists in an improved form oi three part bevel and square provided with a quadrant at one end thereer' arranged so that the angle ci one ol the parte maj,T established relative to the other.

nEhe invention consists vturther in certain arrangements oi parts and combinations of the details hereinafter to be described, illustrated in the accompanying drawings, and specifically set forth in the claims.

in the accompanying drawings like characters oi reference indicate like parts throughout the several views and ll'igure 1 is a plan view oi' the device as arranged for laying ont a Jdirty-'live degree bevel. Fig. 2 is a vienT oi the device folded ior putting away, Fig. 3 is an edge vienv of Fig. 2.

The device consists oi three distinct members. l

For reference these tnrce members will be designated by the letters A, and C shown in 1. The member fr forms the main member or" the device. T .ris member is provided With a longitudinal slot therein, as indicated by the numeral 10. The ei:- terior of this slot and on both sides thereof is formed a suitable scale 11. At one end of the member A there is formed a quadrant 12 having a suitable scale of degrees arranged thereon. rlhe member B is pivotallj,T attached to the member' il., the center ci the pivot being at the zero point oi the scale 11 oi the member Which lies adjacent the quadrant. The member is provided with a slot 13 similar to the slot 10 oi the member A. One edge of this slot is arranged to lie radially to the pivotal center. A thumb screw 14 is held to form the pivot of these two members. The member B is provided With a scale 15 thereon so arranged that the edge of the scale lies on the edge ci the slot 13. The scale 15 will always be radial to the pivot 14. The third member C is provided with a slot 16 similar to the slots 1G and 13 of said members. ln addition the member C is provided With a scale along one edge thereof as indicated by the numeral 17. This scale is so arranged that when the par ts are in the position shown in Fig. 1, that is to say, when the member C is at right angles to the member ft, the scale 17 will have its zero in alinement with the radial scale 11 on the member rfi. Ehe member C is further provided with an extension 18 at right angles to the bodyv ot the member and so arranged that when tl parts are in the position shown in 1 tire edge ol the projection or extension 18 will coincide vfitli the edge oi the member as shown in that ligure. il thumb nut 1Q serves to connect the members A and C pivotallT and slidably. l similar thumb mit 20 serves to connect in like manner the members E and C.

ln ilig. l the device is sbov n as arranged to lav oil an angle ci ortjvdive degrees. lt Will be Anoted that vwhen the `rts are thus positioned the projection 1S will be in such relation to the n einher i that a pencil or scribe: may be drawn along the edge of that member Without interruption or obstruction. lt will be noted that the scale on the quadrant 12 airords a ready means lor laying ont any desired angle. lt is Vfnrther to be noted that bv eason oi one el the scales on 11 and the scale on l being radial it is possible With the ci the member C to latT ont other angies, this being due to the value otl the scales as thus arranged. As an example oi this, it may be stated that il the Zero point of the scale 17 be brought to coincide with the xed point on the scale 11 on the upper edge of the member fr, and the eighth point on the scale 17 be brought to coincide with the ten point on the scale 15, the members C and .fr Will be at right angles. Another example may be cited. it the ten point of the scale 15 is brought to coincide with the rive point oithe scale 17 and the edge oi the extension 18 be brought to coincide with the edge oi the member A the members i3 and A Will be at an angle ot thirty degrees to each other.

lli/'hat is claimed is:

1. .ln a device oi the character described, an arm bearing a quadrant and having a scale arranged thereon, a second arm pivotally connected thereto and a third arm pivotall()T and slidablv connected to the 'iirst and second arms and having a rigidly attached lateral projection at right angles to the bod;r arranged tor alinement With the edge of the iirst arm when said iirst and third arms are in rectangular position.

2. in a device of the character described, an arm hearing a quadrant and having a scale arranged thereon, a second arm pivotally connected thereto, and a third arm pivotally and slidahly connected to the first and second arms, and having a rigidly attached lateral projection at right angles to the body arranged for alineinent with the edge of the `hrst arm when said iirst and third arms are in rectangiiiar position and means for locking any tivo of said arms in adjusted reiation.

3. in a device of the ci-iaracter describe i, an arm bearing a quadrant at one end thereof, said arm being provided with a scale having a Zero point at the center of the quadrant, a second arm pivoted at the center of the quadrant having a similar scaie, and a third arm pivotally and slidahly connected to the 'first and second arms having the .Zero point at the line of the 'first mentioned scaie, and having a rigidly attached lateral projection at right angles to the cody anged Yfor alinement with the edge ci the rirst arm when said rirst and third arms are in rectangular position.

4. in a device or the character described, an arm hearing a quadrant at one end thereof, said arm being provided with a scale having the zero point at the center of the quadrant, a second arm pivoted at the center of the quadrant having a similar scale, and a third arm pivotaiiy and slidably connected having a scale arranged on the same having the Zero point at the line of the 'lirst mentioned scale when the iirst and third arms are at right angles and a rigidly attached lateral projection at right angles to the body arranged for alinernent With the edge of the first arm When said 'first and third arms are in rectangular position.

5. in a device of the character described, an arm bearing a quadrant at one end thereor, said arin being provided with a scale having the Zero point at the center of the quadrant, a second arm pivoted at the center of the quadrant or the scaie and third arm having a iat-eral projection rigidly attached to the body arranged tor alinement With the edge of the 'iirst arm when said rst and third arms are in rectangular position pivotally and slidaoly connected to the 'lirst and second arms having a scaie arranged thereon having the Zero point at the line of the first mentioned scale When the nrst and third arms are at right angles, and means to ioclr said arms in the desired relation.

In testimony that i claim the 'foregoing as my own, l have hereto ailhied my signature in the presence of two Witnesses.

GSCAR A. GSMONSQN.

TnWitnesses Gno. T. HAMERY, Trino. MYERS. 

